2240781 has 8 divisors (see below), whose sum is σ = 2994720. Its totient is φ = 1490352.

The previous prime is 2240779. The next prime is 2240789. The reversal of 2240781 is 1870422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2240781 - 2¹ = 2240779 is a prime.

It is a super-2 number, since 2×2240781² = 10042198979922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1690 + ... + 2708.

It is an arithmetic number, because the mean of its divisors is an integer number (374340).

2^2240781 is an apocalyptic number.

It is an amenable number.

2240781 is a deficient number, since it is larger than the sum of its proper divisors (753939).

2240781 is a wasteful number, since it uses less digits than its factorization.

2240781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2240781 is about 1496.9238457584. The cubic root of 2240781 is about 130.8578572048.

The spelling of 2240781 in words is "two million, two hundred forty thousand, seven hundred eighty-one".